Compiled: June 20, 2015 8:02 PM

vincents blog news

Compiled: June 20, 2015 8:02 PM

Cliff Owen/Associated Press

By DAVID E. SANGER, NICOLE PERLROTH and MICHAEL D. SHEAR

Undetected for nearly a year, Chinese intruders executed a sophisticated hack that gave them "administrator privileges" in government networks. Their ultimate target: information on anyone seeking a security clearance.